PRODUCTION OF TETRACHLORO-1,4-BENZOQUINONE
PURPOSE: To efficiently obtain the subject compound which is an intermediate for pigments, germicides, etc., and chloranil electrodes, additives for lubricating oils, etc., in high purity with good operating efficiency by reacting p-amin...

NOVEL TETRASELENOTETRACENE AND COMPLEX CONTAINING THE SAME
NEW MATERIAL:Naphthaceno[1,12-cd:4,5-c'd']bis[1,2]diselenol of formula I, 1,4,5,12-tetrachloronaphthacene of formula II, 1,4,5,5,12,12-hexachloro-5,12- dihydronaphthacene of formula III and 2,3-dihydro-5,12-dihydroxy-1,4- naphthacenequin...

PROPENE DERIVATIVE
NEW MATERIAL:Propene derivatives shown by formula I (R1 is H or methyl, when R1 is H, R2 and R3 are H or 2-methyl-2-propenyl, and when R1 is methyl, R2 and R3 are H or 2-propenyl; R4 is H or OH) and formula II. EXAMPLE: 3,5-Dimethyl-2-(2...

JPH0436253A

OPTICALLY ACTIVE HEXANE DERIVATIVE
NEW MATERIAL:An optically active compound expressed by formula I [R1 to R3 are H or 1-4C alkyl; R4 and R6 are OH or protected OH, and further R4 is oxo (in said case, benzene ring has benzoquinone structure); R5 and R8 are OH or acyloxy,...

PRODUCTION OF 1,4-BENZOQUINONE
PURPOSE: To obtain 1,4-benzoquinone in high purity and yield using industrial easy operation by dropping an aqueous solution of an oxidizing agent into hydroquinone in the presence of a metallic vanadium salt, dilute sulfuric acid and an...

JPH03275642A

PRODUCTION OF 2-SUBSTITUTED 1,4-NAPHTHOQUINONE
PURPOSE: To efficiently obtain the title compound in high purity by adding a diene compound to a product formed by oxidation of a 2-substituted naphtha lene followed by heating and by separating and removing the resulting 6 substitu tion...

JPH03258745A

PRODUCTION OF CHLORANIL
PURPOSE: To efficiently and economically obtain high-quality chloranil while improving solubility of product in reacting hydroquinone with a chlorine gas in a reaction solvent, by using an acetic acid-water mixed solvent or an acetic aci...

METHOD FOR CHLORINATING 1,4-NAPHTHOQUINONES
PURPOSE: To advantageously obtain chlorinated naphthoquinones by chlorinating the subject compounds with a hydrochloric acid solution at a specific concentration and hydrogen peroxide solution using a metal and metal chloride as a cataly...

JPH03246242A

OPTICALLY ACTIVE PENTANE DERIVATIVE
NEW MATERIAL:An optically active (S)- or (R)-pentane compound expressed by formula I (R1, R2 and R3 are H or 1-4C alkyl; R4 is hydroxy, protected hydroxy or oxo, provided that the benzene ring in the formula becomes the benzoquinone ring...

PRODUCTION OF HYPERICIN
PURPOSE: To obtain hypericin, by reacting emodin enthrone as a starting material with an oxygen-transfer reagent in an aromatic tertiary amine solvent in the presence of a redox catalyst and a secondary amine to form protohypericin and s...

PRODUCTION OF SHIKONIN
PURPOSE: To obtain a high purity shikonin in high yield by dissolving unpurified shikonin in an organic solvent under heating, absorbing impurities contained in the solution on an inorganic absorbent and separating the solution from the ...

PRODUCTION OF 2,3-EPOXY-2,3-DIHYDRO-1,4-NAPHTHOQUINONE
PURPOSE: To obtain the subject compound useful as a raw material of 2- hydroxy-1,4-naphthoquinone with suppressing side reaction and keeping reaction rate in high level by reacting 1,4-naphthoquinone and hydrogen peroxide in a reaction s...

PRODUCTION OF HYDROXYANTHRAQUINONE
PURPOSE: To obtain the subject compound with high purity in high yield for a short reaction time, by reacting phthalic anhydride with a phenol derivative in the presence of a Lewis acid catalyst and an optional diluent in an automatic cl...

NEW CALIXARENE DERIVATIVE
NEW MATERIAL:A calixareone derivative which is a calixarene derivative expressed by formula I or II (n is 3-8). EXAMPLE: p-Hydroquinone type calix[4]areone or p-benzoquinone type calix[4]areone. USE: With including action, physiological ...

JPH03109388A

NOVEL OXAZOLOQUINOLINE DERIVATIVE AND INTERMEDIATE THEREOF
NEW MATERIAL:A compound expressed by formula I (A is -O- or -NH-; R is alkyl or hydroxyalkyl). USE: An antitumor agent. PREPARATION: A compound expressed by formula II is reacted with 1-7 equivalent 2-hydroxyethylamine in an inert solven...

QUINONE DERIVATIVE
NEW MATERIAL:A quinone derivative expressed by formula I (R1 and R2 are H, methyl or methoxy or mutually linked to form CH=CH-CH=CH; R3 is H or methyl; R4 is phenyl which may be substituted with lower alkyl or lower alkoxy; R5 is hydroxy...

JPH0381248A

QUINONE DERIVATIVE
NEW MATERIAL:A quinone derivative expressed by formula I or hydroquinone derived from said derivative (R1 and R2 are same or different methyl or methoxy, or R1 and R2 are mutually bonded to form-CH=CH-CH=CH-; R3 is methyl; R4 is substitu...

JPH0381246A

PRODUCTION OF QUINONES
PURPOSE: To obtain the subject compounds for, synthesis of hydroquinone useful in photograph industry with a high selectivity without a problem of corrosion of metallic materials by reacting phenol with oxygen in the presence of a specif...